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US20110073280A1 - Heat-dissipating fan having dust-proof structure - Google Patents

Heat-dissipating fan having dust-proof structure Download PDF

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Publication number
US20110073280A1
US20110073280A1 US12/869,299 US86929910A US2011073280A1 US 20110073280 A1 US20110073280 A1 US 20110073280A1 US 86929910 A US86929910 A US 86929910A US 2011073280 A1 US2011073280 A1 US 2011073280A1
Authority
US
United States
Prior art keywords
bearing
rotor
axle
shaft
dust
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US12/869,299
Inventor
Ching-Tang Liu
Dong-Sheng Yi
Tai-Ying Lv
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Assigned to LIU, CHING-TANG reassignment LIU, CHING-TANG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: LIU, CHING-TANG, LV, TAI-YING, YI, Dong-sheng
Publication of US20110073280A1 publication Critical patent/US20110073280A1/en
Abandoned legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D25/0606—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump
    • F04D25/0613—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump the electric motor being of the inside-out type, i.e. the rotor is arranged radially outside a central stator
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D25/0606—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump
    • F04D25/0613—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump the electric motor being of the inside-out type, i.e. the rotor is arranged radially outside a central stator
    • F04D25/062—Details of the bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
    • F04D25/082—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation the unit having provision for cooling the motor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
    • F04D29/053—Shafts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
    • F04D29/056—Bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/08—Sealings
    • F04D29/083—Sealings especially adapted for elastic fluid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/08—Sealings
    • F04D29/10—Shaft sealings
    • F04D29/102—Shaft sealings especially adapted for elastic fluid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/70—Suction grids; Strainers; Dust separation; Cleaning
    • F04D29/701—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps
    • F04D29/703—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps specially for fans, e.g. fan guards

Definitions

  • the present invention relates to a heat-dissipating fan, and more particularly to a heat-dissipating fan having a dust-proof structure in a non-contact type.
  • Heat-dissipating fans are widely used on electronic products to solve the heat-dissipating problems, such as a CPU, a display card, a power supply, and the like.
  • a conventional heat-dissipating fan comprises a stator and a rotor.
  • An oil-retaining bearing is provided in a shaft hole of a shaft on a base of the stator.
  • the stator includes an electromagnetic coil and silicon steel sheets fixed on the shaft.
  • the rotator has an axle inserted in the oil-retaining bearing and a permanent magnetic ring fitted on the electromagnetic coil. When the fan is turned, the magnetic field of the electromagnetic coil and the magnetic ring drives the rotor to turn around the shaft.
  • the blades of the rotator generate an air current to expel the heat from the electronic products so as to lower the temperature.
  • the conventional fan has the function to dissipate heat
  • the dust or water vapor will be accumulated in the fan to influence the running and the service life of the fan.
  • the fan cannot run smoothly or may malfunction.
  • the primary objective of the present invention is to provide a heat-dissipating fan having a dust-proof structure in a non-contact type to overcome the shortcomings of the prior art.
  • a heat-dissipating fan having a dust-proof structure.
  • the fan comprises a stator and a rotor.
  • the stator comprises a shaft and a bearing disposed in a shaft hole of the shaft.
  • the rotor includes an axle inserted in the bearing.
  • the axle of the rotor has an inner end connected with an axle seat.
  • the axle seat is located in the shaft hole of the shaft.
  • a slight gap is defined between an outer wall of the axle seat and an inner wall of the shaft hole.
  • the outer wall of the axle seat has a plurality of guiding grooves to block external air from entering the bearing.
  • the guiding grooves are spiral grooves or V-shaped grooves.
  • the guiding grooves are used to expel the air along with the rotation of the rotor, achieving a dust-proof protective structure in a non-contact type to block external dust or water vapor from entering the bearing to influence the running of the bearing.
  • the present invention can enhance the service life of the heat-dissipating fan.
  • the guiding grooves are spiral grooves.
  • the guiding grooves are V-shaped grooves each including a first groove and a second groove.
  • the first groove is adapted to compress air in the bearing inward.
  • the second groove is adapted to expel external air.
  • the first groove and the second groove are obliquely formed on the outer wall of the axle seat and have respective distal ends interconnected.
  • the feature of the present invention is that the inner end of the axle of the rotor is connected with the axle seat and the outer wall of the axle seat is provided with the plurality of guiding grooves.
  • the guiding grooves are used to expel the air along with the rotation of the rotor, achieving a dust-proof protective structure in a non-contact type to block external dust or water vapor from entering the bearing to influence the running of the bearing.
  • the present invention can enhance the service life of the heat-dissipating fan.
  • FIG. 1 is a cross-sectional view showing a heat-dissipating fan according to a preferred embodiment of the present invention
  • FIG. 2 is an enlarged view showing an axle and an axle seat having spiral grooves thereon according to the preferred embodiment of the present invention
  • FIG. 3 is an enlarged view showing an axle and an axle seat having V-shaped grooves thereon according to the preferred embodiment of the present invention.
  • FIG. 1 is a cross-sectional view showing a heat-dissipating fan according to a preferred embodiment of the present invention.
  • the heat-dissipating fan comprises a stator 10 and a rotor 20 .
  • the stator 10 comprises a shaft 11 and a bearing 13 disposed in a shaft hole 12 of the shaft 11 .
  • the rotor 20 comprises an axle 21 which is inserted in the bearing 13 .
  • the axle 21 of the rotor 20 has an inner end connected with an axle seat 22 .
  • the axle seat 22 is located in the shaft hole 12 of the shaft 11 .
  • a slight gap is defined between an outer wall of the axle seat 22 and an inner wall of the shaft hole 12 .
  • the outer wall of the axle seat 22 has a plurality of guiding grooves 23 to expel the air in the bearing 13 .
  • the guiding grooves 23 are spiral grooves.
  • the spiral grooves are adapted to expel the air in the shaft hole 12 of the shaft 11 to form negative pressure in the shaft hole 12 , preventing external dust or water vapor from entering the bearing 13 in the axle hole 12 .
  • the guiding grooves 23 are V-shaped grooves each including a first groove 231 and a second groove 232 .
  • the first groove 231 and the second groove 232 are obliquely formed on the outer wall of the axle seat 22 and have respective distal ends interconnected.
  • the first groove 231 is used to compress the air in the shaft hole 12 inward
  • the second groove 232 is used to expel external air, such that the junction of the first groove 231 and the second groove 232 forms lower pressure to block external dust or water vapor from entering the bearing 13 in the axle hole 12 .
  • the feature of the present invention is that the inner end of the axle of the rotor is connected with the axle seat and the outer wall of the axle seat is provided with the plurality of guiding grooves.
  • the guiding grooves are used to expel the air along with the rotation of the rotor, achieving a dust-proof protective structure in a non-contact type to block external dust or water vapor from entering the bearing to influence the running of the bearing.
  • the present invention can enhance the service life of the heat-dissipating fan.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Mounting Of Bearings Or Others (AREA)

Abstract

A heat-dissipating fan having a dust-proof structure includes a stator and a rotor. The stator includes a shaft and a bearing disposed in a shaft hole of the shaft. The rotor includes an axle inserted in the bearing. The axle of the rotor has an inner end connected with an axle seat. The axle seat is located in the shaft hole of the shaft. A slight gap is defined between an outer wall of the axle seat and an inner wall of the shaft hole. The outer wall of the axle seat has a plurality of guiding grooves to block external air from entering the bearing. The guiding grooves are spiral grooves or V-shaped grooves. The guiding grooves are used to expel the air along with the rotation of the rotor, achieving a dust-proof protective structure in a non-contact type to block external dust or water vapor from entering the bearing to influence the running of the bearing. The present invention can enhance the service life of the heat-dissipating fan.

Description

    BACKGROUND OF THE INVENTION
  • 1. Field of the Invention
  • The present invention relates to a heat-dissipating fan, and more particularly to a heat-dissipating fan having a dust-proof structure in a non-contact type.
  • 2. Description of the Prior Art
  • Heat-dissipating fans are widely used on electronic products to solve the heat-dissipating problems, such as a CPU, a display card, a power supply, and the like. A conventional heat-dissipating fan comprises a stator and a rotor. An oil-retaining bearing is provided in a shaft hole of a shaft on a base of the stator. The stator includes an electromagnetic coil and silicon steel sheets fixed on the shaft. The rotator has an axle inserted in the oil-retaining bearing and a permanent magnetic ring fitted on the electromagnetic coil. When the fan is turned, the magnetic field of the electromagnetic coil and the magnetic ring drives the rotor to turn around the shaft. The blades of the rotator generate an air current to expel the heat from the electronic products so as to lower the temperature.
  • Although the conventional fan has the function to dissipate heat, there are some shortcomings existed in its structure and function when in use. In particular, there are gaps between the hub of the rotor and the base of the stator and between the top of the shaft and the bottom of the hub of the rotor, so external dust may enter the fan. After a period of time, the dust or water vapor will be accumulated in the fan to influence the running and the service life of the fan. Particularly, when the dust or water vapor enters the oil-retaining bearing, the fan cannot run smoothly or may malfunction.
    • SUMMARY OF THE INVENTION
  • The primary objective of the present invention is to provide a heat-dissipating fan having a dust-proof structure in a non-contact type to overcome the shortcomings of the prior art.
  • According to the present invention, there is provided a heat-dissipating fan having a dust-proof structure. The fan comprises a stator and a rotor. The stator comprises a shaft and a bearing disposed in a shaft hole of the shaft. The rotor includes an axle inserted in the bearing. The axle of the rotor has an inner end connected with an axle seat. The axle seat is located in the shaft hole of the shaft. A slight gap is defined between an outer wall of the axle seat and an inner wall of the shaft hole. The outer wall of the axle seat has a plurality of guiding grooves to block external air from entering the bearing. The guiding grooves are spiral grooves or V-shaped grooves. The guiding grooves are used to expel the air along with the rotation of the rotor, achieving a dust-proof protective structure in a non-contact type to block external dust or water vapor from entering the bearing to influence the running of the bearing. The present invention can enhance the service life of the heat-dissipating fan.
  • Preferably, the guiding grooves are spiral grooves.
  • Preferably, the guiding grooves are V-shaped grooves each including a first groove and a second groove. The first groove is adapted to compress air in the bearing inward. The second groove is adapted to expel external air. The first groove and the second groove are obliquely formed on the outer wall of the axle seat and have respective distal ends interconnected.
  • Compared to the prior art, the feature of the present invention is that the inner end of the axle of the rotor is connected with the axle seat and the outer wall of the axle seat is provided with the plurality of guiding grooves. The guiding grooves are used to expel the air along with the rotation of the rotor, achieving a dust-proof protective structure in a non-contact type to block external dust or water vapor from entering the bearing to influence the running of the bearing. The present invention can enhance the service life of the heat-dissipating fan.
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • FIG. 1 is a cross-sectional view showing a heat-dissipating fan according to a preferred embodiment of the present invention;
  • FIG. 2 is an enlarged view showing an axle and an axle seat having spiral grooves thereon according to the preferred embodiment of the present invention, and
  • FIG. 3 is an enlarged view showing an axle and an axle seat having V-shaped grooves thereon according to the preferred embodiment of the present invention.
    •  DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
  • Embodiments of the present invention will now be described, by way of example only, with reference to the accompanying drawings.
  • FIG. 1 is a cross-sectional view showing a heat-dissipating fan according to a preferred embodiment of the present invention. The heat-dissipating fan comprises a stator 10 and a rotor 20. The stator 10 comprises a shaft 11 and a bearing 13 disposed in a shaft hole 12 of the shaft 11. The rotor 20 comprises an axle 21 which is inserted in the bearing 13.
  • Particularly, the axle 21 of the rotor 20 has an inner end connected with an axle seat 22. The axle seat 22 is located in the shaft hole 12 of the shaft 11. A slight gap is defined between an outer wall of the axle seat 22 and an inner wall of the shaft hole 12. The outer wall of the axle seat 22 has a plurality of guiding grooves 23 to expel the air in the bearing 13.
  • As shown in FIG. 2, the guiding grooves 23 are spiral grooves. When the rotor 20 is turned at a high speed, the spiral grooves are adapted to expel the air in the shaft hole 12 of the shaft 11 to form negative pressure in the shaft hole 12, preventing external dust or water vapor from entering the bearing 13 in the axle hole 12.
  • As shown in FIG. 3, the guiding grooves 23 are V-shaped grooves each including a first groove 231 and a second groove 232. The first groove 231 and the second groove 232 are obliquely formed on the outer wall of the axle seat 22 and have respective distal ends interconnected. The first groove 231 is used to compress the air in the shaft hole 12 inward, and the second groove 232 is used to expel external air, such that the junction of the first groove 231 and the second groove 232 forms lower pressure to block external dust or water vapor from entering the bearing 13 in the axle hole 12.
  • The feature of the present invention is that the inner end of the axle of the rotor is connected with the axle seat and the outer wall of the axle seat is provided with the plurality of guiding grooves. The guiding grooves are used to expel the air along with the rotation of the rotor, achieving a dust-proof protective structure in a non-contact type to block external dust or water vapor from entering the bearing to influence the running of the bearing. The present invention can enhance the service life of the heat-dissipating fan.
  • Although particular embodiments of the present invention have been described in detail for purposes of illustration, various modifications and enhancements may be made without departing from the spirit and scope of the present invention. Accordingly, the present invention is not to be limited except as by the appended claims.

Claims (3)

1. A heat-dissipating fan having a dust-proof structure, comprising a stator and a rotor, the stator comprising a shaft and a bearing disposed in a shaft hole of the shaft, the rotor comprising an axle inserted in the bearing, and characterized by:
the axle of the rotor having an inner end connected with an axle seat, the axle seat being located in the shaft hole of the shaft, a gap defined between an outer wall of the axle seat and an inner wall of the shaft hole, the outer wall of the axle seat having a plurality of guiding grooves to expel air in the shaft hole.
2. The heat-dissipating fan having a dust-proof structure as claimed in claim 1,
wherein the guiding grooves are spiral grooves.
3. The heat-dissipating fan having a dust-proof structure as claimed in claim 1,
wherein the guiding grooves are V-shaped grooves each including a first groove and a second groove, the first groove being adapted to compress air in the bearing inward, the second groove being adapted to expel external air, the first groove and is the second groove being obliquely formed on the outer wall of the axle seat and having respective distal ends interconnected.
US12/869,299 2009-09-25 2010-08-26 Heat-dissipating fan having dust-proof structure Abandoned US20110073280A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN200920195454.3 2009-09-25
CN200920195454.3U CN201526492U (en) 2009-09-25 2009-09-25 Non-contact dustproof structure of heat dissipation fan

Publications (1)

Publication Number Publication Date
US20110073280A1 true US20110073280A1 (en) 2011-03-31

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US (1) US20110073280A1 (en)
EP (1) EP2302217A3 (en)
CN (1) CN201526492U (en)
WO (1) WO2011035636A1 (en)

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JP2013245657A (en) * 2012-05-29 2013-12-09 Minebea Co Ltd Air blower shaft and air blower
CN103511347A (en) * 2012-06-19 2014-01-15 奇鋐科技股份有限公司 Fan structure
US9422943B2 (en) 2012-09-25 2016-08-23 Sunon Electronics (Kunshan) Co., Ltd. Centrifugal fan
US20190353177A1 (en) * 2018-05-21 2019-11-21 Asia Vital Components Co., Ltd. Fan frame seat and fan thereof
CN111963476A (en) * 2020-08-13 2020-11-20 惠州惠和兴电子有限公司 Well pipe sheath that radiator fan used
US20200392965A1 (en) * 2018-02-21 2020-12-17 Candu Energy Inc. Nuclear coolant pump seal and methods of sealing
US20250215901A1 (en) * 2024-01-02 2025-07-03 Global Win Technology Co., Ltd. Fan anti-foreign matter structure

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CN201526492U (en) * 2009-09-25 2010-07-14 东莞寮步新旧围永立电机厂 Non-contact dustproof structure of heat dissipation fan
CN102230474B (en) * 2011-06-28 2013-03-27 广州南科集成电子有限公司 Waterproof and dustproof fan
EP3486533B1 (en) * 2017-11-15 2022-08-24 Elektrosil GmbH Fan
CN110131211B (en) * 2019-06-21 2024-09-27 郑州飞龙汽车部件有限公司 Pump body of centrifugal pump and centrifugal pump
CN111867337B (en) * 2020-08-05 2022-08-23 维沃移动通信有限公司 Heat sink device
CN115163575A (en) * 2022-08-11 2022-10-11 肇庆晟辉电子科技有限公司 Dustproof construction of fan and fan thereof

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US4969797A (en) * 1989-03-22 1990-11-13 Matsushita Electric Industrial Co., Ltd. Fan motor
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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013245657A (en) * 2012-05-29 2013-12-09 Minebea Co Ltd Air blower shaft and air blower
CN103511347A (en) * 2012-06-19 2014-01-15 奇鋐科技股份有限公司 Fan structure
US9422943B2 (en) 2012-09-25 2016-08-23 Sunon Electronics (Kunshan) Co., Ltd. Centrifugal fan
US20200392965A1 (en) * 2018-02-21 2020-12-17 Candu Energy Inc. Nuclear coolant pump seal and methods of sealing
US11913465B2 (en) * 2018-02-21 2024-02-27 Candu Energy Inc. Nuclear coolant pump seal and methods of sealing
US20190353177A1 (en) * 2018-05-21 2019-11-21 Asia Vital Components Co., Ltd. Fan frame seat and fan thereof
CN111963476A (en) * 2020-08-13 2020-11-20 惠州惠和兴电子有限公司 Well pipe sheath that radiator fan used
US20250215901A1 (en) * 2024-01-02 2025-07-03 Global Win Technology Co., Ltd. Fan anti-foreign matter structure

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Publication number Publication date
WO2011035636A1 (en) 2011-03-31
EP2302217A3 (en) 2012-11-07
EP2302217A2 (en) 2011-03-30
CN201526492U (en) 2010-07-14
JP3164720U (en) 2010-12-16

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